Philodromus collinus

Length 4 to 6 mm. Prosoma with broad, dark brown lateral stripes and almost white centre. Legs yellowish grey or brown with black spots. Opisthosoma dorsally with broad median band consisting of large, yellowish white spots.

Other members of the P. aureolus group. 

Confirmation of this species: "Requires examination at high magnification in good lighting, typically examination of the genitalia." Bee, L., Oxford, G., & Smith, H. (2020). Britain's Spiders: A Field Guide. Second Edition. Princeton University Press.

On sunny trees and shrubs, including conifers. 

Adults May to July. 

Restricted to south and east England. 

Difficult to identify and probably under reported in Leicestershire and Rutland.

http://srs.britishspiders.org.uk/portal.php/p/Summary/s/Philodromus+collinus